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Real-time video target tracking method

A target tracking, real-time video technology, used in CCTV systems, image data processing, instruments, etc.

Inactive Publication Date: 2008-05-07
上海龙东光电子有限公司
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AI Technical Summary

Problems solved by technology

Early TVs and IR trackers used a single mode of operation and had to be implemented entirely in hardware

Method used

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Examples

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Embodiment Construction

[0023] For tracking example 1, as shown in Figure 1(a), the tracked target (white van) and the corresponding target template image are selected in the first frame image. Select the search range on the current frame image, select a rectangular area with the center of the target template as the center, and twice the length and width of the target template image as the local search range. Use the target template image to calculate the image quality parameters of each sub-region image in the search range with the same size as the target template image according to formula (1). When the image quality parameter reaches the maximum, it is judged that the target tracking is successful. Investigate the image quality parameter at this time, if it is greater than the predetermined threshold (0.9 is used as the threshold in this example), it means that there is no occlusion phenomenon, and the current sub-region image is used as the new target template image; if the image quality parameter...

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Abstract

The present invention relates to the field of video image processing technology, in particular to a new method based on the related real-time video target tracking. In the method, a target is tracked by the mode of regional image search, and an image quality parameter is used as the characteristic parameter of target tracking. The image quality parameter characterizes the similarity between images, so that the value of the image quality parameter can represent the success degree of the target tracking. The image quality parameter is composed of three parts, that is, a correlation coefficient, contrast distortion and brightness distortion. The correlation coefficient characterizes the structural correlation between two images; the contrast distortion characterizes the similarity degree of the two images in terms of contrast; the brightness distortion characterizes the similarity degree of the two images in terms of brightness. Consequently, the image quality parameter comprehensively considers the integral information of images and therefore is particularly used as the characteristic parameter of target tracking. Meanwhile, the present invention puts forward the corresponding update policy of threshold templates and increases the robustness of algorithms.

Description

technical field [0001] The invention belongs to the technical field of video image processing, and in particular relates to a new method for real-time video target tracking. Background technique [0002] The detection and tracking of a moving target in a sequence of images refers to detecting the moving target and calculating the position of the target on each frame of the image by analyzing the captured image sequence, and then obtaining the relevant parameters. This problem is the main content of computer vision [1] [2] research. Computer vision is a multidisciplinary subject, involving image processing, computer graphics, pattern recognition, artificial intelligence, neural networks, computers, psychology, physiology, physics and mathematics. [0003] Video tracking technology is an indispensable key technology in computer vision. It has been widely used in many aspects such as robot visual navigation, military visual guidance, security monitoring, traffic control, medic...

Claims

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Application Information

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IPC IPC(8): H04N7/18G06T7/20
Inventor 陈应光
Owner 上海龙东光电子有限公司
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